All whom it may concern



@uiten tatts l gd-it'ttttt4 @frn FURMA N wins N, o F Nnwnroltn, N. Y. lLcltersiPatent No. 67,392, dated Jt'y 3Q, 1867.

TO' ALL WHOM IT MAY CONCERN: il' Be it known that I, FURMAN R. WILSON,of the city and Stute of New York, have invented certain new and'u'sefulImprovements in Steam Stam'pngll'lills; anddohereby declare that thefollowing is a full, clear, and exact description ofthe construction andoperation of the same, reference being had to the annexed drawings,forming part hereof, and to the letters of reference marked thereon, inwhich drawings Figure 1 is a perspective view ol' a stamping-mill, withmy improvements added. Figure 2, a side view oi' lever It, and of someof the parts immediately connected with it. Figurc 3, a vertical sectionof the piston, piston-rod, cam-rod, and cam. l The nature of myinvention consists of acombination ol mechanism for operating the valveswhich admit steam into the cylinder below the piston, and also acombination of mechanism for operating the valves which -admit steaminto the cylinder above thepiston, for the doublc purpose hereinaftermentioned.

To enable others skilled in the art to make and use my improvements, Iwill proceed to describe their construction and mode of operation. v

The drawings represent a mill of two stamps, but it is to bevunderstoodthat a mill may comprise either a Asingle stamp, or any number of stampsdesired. With a view toclearne'ss, I shall describe my improvements esapplied to the parts which constitute a single stamp, promising that thesame description will apply to euch stamp employed.

In iig. 1, A is a strongframe of wood; B n steam-cylinder, with lugs a,through which it is bolted to the frame A. C is the mortar. D, the die.E is the piston-rod or stamp-rod, which has the stamp F attached to itslower end in' the usual manner-. G and Gare steamchests. II, pipes whichconvey the steam into the steam-chests. I I', cocks for-regulating thesupply of steam. J, pipes throng-'5h which thesteam exhausts. K- is thecam-rod,which is attached tothe piston, as shown inv g- -3- The 1,0dK0,llllllgh'u stVufing-box in the cylinder-head, and has a cam, c,screwed or otherwise fastened on its' upper end. The cam c must havesuliicient swell in the middle to bringr it in contact with the lever R,as hereinafter described; but it is not necessary that it should be ofthe exact form shown; it may be curved continuously from' end to end, sothat a longitudinal section of it would be about elliptical. LA is therod attached to the lower valve, which is an ordinary sliding-valve. Therod L has two shoulders vor collars d d', which limit the play ofthelever M. The I lever M slides through ordinary journal-boxes, which areattached to supporting standards or arms O 0', the latter being firmlysecured to the frame A. A reciprocating motion ,is given to the lever Mby means' of a crank, Q. The elect of this arrangement is such thatv thevalve-rod L is moved intermittently, pausing in its l motion while thearm P of lever M traverses from shoulder d to the shoulder df, and niceversa. This pausing of the 4valve-rod L causes the valve-port foradmitting steam to remain open for a time sullicient to secure the Yfull stroke-of the piston upward. R is a lever turning on e.fulcrum-pin, S, and supported froml the frume-A by the standard T. Thelower end of lever Ris attached by a exiblc joint to the valve-rod U,which is attached` to an ordinary sliding-valve for the admission ofsteam above the piston. The leverR works automatically, and is providedwith friction-rollers g z.

When'thc piston is at thc limit of its downward stroke the lever R is insuch position that the exhaustport of the upper valve is open,l and itis allowed to remain open until the piston has nearly reached the limitlof its upward stroke, when the cam c comes in contact with thefriction-roller g of lever R, forcing the upper i end of this leveroutward and its lower end inward, thereby closing the exhaust-port andopening. the supplyport of the upper valve. The steam thus admittedoperates both to cushion the piston and start 1t with forcel on itsdownward stroke. The supply-port of the upper valve remains open untilthe piston' has travelled about two-thirds of its downward stroke, whenthe cam c comes in contact with roller t 'of lever R, drawing out thevulve-rod U, thereby closing the supply-port and opening theexhaust-port of the upper valve. i

The cylinder B is made longer than the stroke which the piston isintended to have when the stamp 1s new i or unworn, there being .a spaceof' from fourv to six inches indepth between the piston 'when at thelimit of its downward stroke and the lower head of the cylinder, theobject being to obviate the strikingof the piston, xn

I its downward stroke, againstthe head last mentioned when the'stamp Fshall have become worn by use.

This mechanism, when supported by a properly-constructed frame, may beemployed as a steam-hammer.

Having thus described my improvements, I claim, and desire to secureby'Letters :Patent-j- '1. The combination of the crank Q, sliding-leverM, and valve-rod Lin the manner. and for the purpose substantially asset forth.

' 2. The combination 'of rod K, cam c, lcverwR, and rod U, in the mannerand for the purpose substantially asset forth. l R. WILSON.

Witnesses:

FRANKLIN SMALL,

Guo.l E. Buckner.

